i cant turn on certain mods

[popcoolman68]

so sometimes i wanna play the gun mod that comes with coop dx, but even if i have no other mods enabled it wont let me turn it on. same with arena, day night cycle, widdle pets, and mquake. i dont know why this happens and its really odd

 

[Duckygaming]

You probably have sm64ex-coop compatibility enabled , when you host you need to disable sm64ex-coop compatibility and you should be able to enable the mods.